Description

LAST LAB! 🙂
Announcements!
● This is the last lab!!!
● Do APS1 first if you haven’t yet (APS2 can then be done during
buffer)
● Course evaluations: ○ Linked here
● APS buffer labs 8/12 and 8/13
● Good luck on the final!! :))
Last lab: APS 1
● Cross correlated beacons with received signal
● Found the offsets (in samples) between peaks, converted to TDOAs, and calculated distances from each beacon
● What was the missing piece that we needed to calculate distance?
○ Hint: we don’t have absolute times of arrival for all the beacons, only offsets.
3 beacon example
● Let beacon centers be: (x0, y0), (x1, y1) and (x , y )
● Time of arrivals: t0, t1, t2
● Distance of beacon m (m = 0, 1, 2) is dm = vt = R
(circle radii)
Circle equations: (x – xm)2 + (y – ym)2 = d2m

● R =
● R =

Setup Looks Like:

Important notes

● Read over the math carefully, We’ll be asking you about it!
● Stay safe and enjoy the rest of summer! *Virtual hand wave*
○ Thank you for being part of this remote offering!